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Magnetic anisotropy of perpendicular media on grooved structure substrate

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3 Author(s)
Tagami, K. ; NEC Corp., Kawasaki, Japan ; Gokan, H. ; Mukainaru, M.

Magnetic anisotropies were investigated for CoCr perpendicular magnetic films on grooved structure substrates (pitch length 2.1 μm) prepared by CF4-reactive-ion etching. Perpendicular magnetic anisotropy decreases in the region where groove depth GD >650 A. The reduction is due to the inclination of the crystal growth axis on the groove surface. In-plane magnetic anisotropy, Ku||, strongly depends on GD and saturation magnetization Ms. In a region of large GD and large Ms, Ku|| is mainly due to shape anisotropy. In a region of small GD and small Ms , Ku|| is caused by perpendicular magnetic anisotropy, in addition to shape and magnetorestrictive anisotropy

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Magnetics, IEEE Transactions on  (Volume:24 ,  Issue: 6 )